Okay, you've correctly identified a potential issue with 230.3 and the spirit behind it. Here's a breakdown of how to think about this and some possible solutions

Why 230.3 Exists

The primary reason for 230.3 (Service Entrance Conductors Not Run Through Other Buildings) is safety and accessibility. It's there to prevent situations where: One tenant controls another tenant's power

If the service for storefront B passes through storefront A, the owner/tenant of A could potentially tamper with or disconnect B's service.

Fire hazard

A fault in the service conductors running through one tenant's space could create a fire that's difficult for the fire department to access and control.

Accessibility for emergencies

In an emergency, firefighters need to be able to quickly disconnect power to any part of the building. Having services intertwined makes this difficult.

Future Ownership/Lease Changes

As you rightly pointed out, if ownership changes, you've created a potential legal and logistical mess.

Analyzing Your Situation

You need to weigh these points against the specifics of the situation: Permanent Wall

The key here is that you have a permanent, fire-rated wall separating the two storefronts. That makes a big difference. This is not like a single unit apartment with a meter on a wall.

Ownership/Management

Who owns the whole building? Is it a single owner who manages both halves, or are they different entities? If it's a single owner with good management control, the risk is lower, but you still need to consider the future.

Accessibility

The side access is only good for one side.

Possible Solutions and Considerations

Here are several approaches, ordered roughly from most compliant/desirable to least:1. Separate Service Entrances - Best Option (If Possible)

This is the gold standard, but you've said it's not possible for the other half to have access. I would dig deeper into why it's not possible. Is it a physical barrier that can't be overcome? Could you route the second service a long way around, even if it's more expensive? Think about all possible routes even if it is a bigger pain to do.2.

Two Services on One Side - Individual Disconnects

Consider two separate meter/disconnect combos on the side of the building, right next to each other. Then, run each service into its respective half. You still have to run a service entrance conductor though one unit, but it will be properly sized and have an OCPD.3.

Main Breaker Before Penetration

You can install the meter outside then run a feeder through to a breaker box, and then run it through the wall. Then each unit will have its own disconnect.4.

Talk to the Inspector! This is crucial. Don't try to sneak anything by. Explain the situation, your proposed solution, and ask for their feedback before you start the work. They might have specific interpretations or local amendments that apply. Document their guidance in writing.

Important Considerations



Fire Rating

If you do run service entrance conductors through one unit to the other, you must ensure that the penetration through the fire-rated wall is properly sealed with a fire-rated sealant. Use a product that's specifically designed for electrical penetrations.

Dedicated Raceway

Always run service conductors in a dedicated, rigid conduit raceway (RMC or IMC) from the service point to the disconnect.

Signage

Clearly label each service disconnect with the address it serves. This is essential for emergency responders.

Documentation

Document everything! Keep detailed drawings of the service layout, the materials used, and any conversations with the inspector.

Warranty I would even put something in the warranty indicating there may be future issues with this type of install.

In Summary

While it's tempting to find a quick and easy solution, you need to prioritize safety, code compliance, and long-term usability. Talk to the inspector, explore all possible routing options, and document everything thoroughly. Good luck! Flag for review